Grinding-machine.



E. P. SACREY.

GRINDING MACHINE.

APPLICATION FILED MAY 12, 1915.

Patented May 9,1916.

2 SHEETS-SHEET! I IT "an STATES PATENT" "orrion.

ELMEB P. SAGREY, 0F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO FISCHER, OFPHILADELPHIA, PENNSYLVANIA.

Application filed may 12, 1915. Serial m. 27,483.

To all whom it mag concern:

Be it known that 1, Emma P. SAGREY, a citizen of the United States,residing in the city of Philadelphia, county of-Phlladelphia, and Stateof Pennsylvania, have 1nvented certain Improvements in Grmdmg- Machines,of which the following is a specification.

My improvements in grinding machmes relate more particularly to meansfor truing grinding wheels, and have the purpose, generally stated, ofproviding mechanism of simple, accurate, eificient, readily operable,and readily adjustable character adapted for truing the peripheries ofgrinding wheels of different sizes to desired contours, preferably suchthat the periphery of the wheel intersects in an are a plane passedthrough the axis of the wheel, and facing the wheels adjacent surfacesto conical or conoidal form.

The characteristic construction and mode of operation of the preferredform of my mechanism for effecting the above purpose of my invention,are disclosed in the following description and the accompanying drawingsin illustration thereof.

In tlie drawings, Figure 1 is a top plan view of part of a grindingmachine having my improvements applied thereto; Fig. 2 is a broken sideelevation of a machine embodying the construction of Fig. 1; Fig. 3

is a top .plan view of 'my improved mech anism detached; Fig. 4 is avertical sec the holder 3, and it will be understood that the use ofsuch wheels reduces their diameters and renders them irregular or untruein peripheral contour as a result of wear, which necessitates truingthe' cutting surface and renders it important to have 'eiiicient truingmechanism that is accurate as well as adjustable to varying conditions.

These desiderata' are .eflected by my im- Specification of Letterslatent.

WILLIAM F.

GRIN DING-MACHIN E.

Patented May 9, 191 6.

provements which are embodied in the mechanism comprisingthe bed 4 fixedon the machine 1 in the plane of the wheel 2; the bed plate 5pivotally'connected to the journaled in the part 4; the slide 8 havingthe dovetail groove 8' movable on the longitudinal dovetail way 5 of theplate 5; the screw 9 adapted to feed into the plate 5 and swiveled inthe bearing 8 on the slide 8. to move the latter longitudinally; theplate 10 which is held on the slide 8 by the screw stud 11 having thecircular head sections 11 affording a bearing whereby the plate isadapted to be oscillated; the guide rods 12 supported by brackets 13 onthe sides of the plate 10; the slide 1 1 having the bearings 14' movableon the rods 12; the turret 15 (with the standard 15 thereon providedwith a cuttingtool 15") which is engaged on the slide 14; in revolublerelation thereto by the screw stud 16 having the circular head sections16; the shaft 17 journaled on the plate 10 and turned by the handle 17'the pinion 17" on the shaft 17 which engages a rack 14" on the slide 14to reciprocate the latter; a coiled spring 18 on the shaft 17 with oneend fixed thereto and the other engaging the plate 10 to turn the pinion17" so as .to draw back the. slide;

the lever 19 which is fulorumed on a stud 10 on the plate. 10, the leverbeing provided with the longitudinal slot 19- engaging a stud 8 on theslide 8 and the cam slot 19" having sideswith sections .19 approximatelyparallel to a line through the parts 8 and l0 and sections 19approximately parallel to therods 12, and a roller 20 fixedon the turret15 through the stud 16 and lying between the parallel side sections ofthe slot 19''.

son, it becomes desirable or. necessary to 'truethe wheel 2, the slide 8(which is drawn When, as a result of use or for any reaback. to hold thetruing mechanism away to be formed on the left side of the wheel.-

screw 9 and centered in the plane of the wheel by turning the Worm shaft7 The tool 15 being thus disposed at the proper distance from theperiphery ofthe wheel 2 for effecting the desired operation, the turret15 is turned by means of the handle 15 thereon and the tool 15 is thusoscillated through an arc of 180 degrees so as to give the wheelsperiphery a true surface intersecting its axial planes in semi-circulararcs,

the oscillatory movement of the turret being limited by the engagementof its handle 15 with stops 14 on the slidell and by reversing theposition of the plate 10. The periphery of the Wheel having been trued,the revolving wheel is conically faced down to the limits of theperiphery by reciprocating the slide 14 on the rods 12 through theaction of the inion 17 on the rack 14' due to operatlng the shaft 17,handle 17, and spring 17. In this operation, .the mechanism is in theposition shown in- Fig. l, with the rods '12 parallel to the elements ofthe cone to be formed on the right side of the wheel when facing thewheels right side, and is thrown to the reverse position,

with the rods parallel to the cone elements when the left side of thewheel is to be faced, the turret being reversed to place the tool 15 onthe opposite sides of the wheel for the two facing operations. When thehandle 15 is turned and the turn table 15 is oscillated on the slide 14,the roller 20, fixed eccentrically to the axis, acts between theparallel surfaces of the cam 19" to p the periphery of said wheel, andoscillatory mechanism comprising a reciprocating slide on which saidholder oscillates and bywhich said tool is adapted for facing saidwheel.

2. The combination with a wheel, of mechanism comprising a tool, a toolholder having an oscillatory action for operating said tool in acircular arc in contact with the periphery of said wheel, a slide onwhich said holder is mounted, and oscillatory guiding means for saidslide.

3; The combination with a wheel, of mech* anism" comprising a tool fortruing sai wheel, a holder having-an oscillatory movement for turningthe periphery of saldv wheel, a slide carrying said holder for reciprocating said tool and means wherebysaid slide is shiftable todififerent positions for permitting the reciprocation of said tool incontact with opposite sides of said wheel.

4. The combination with a wheel, ofmech anism comprising a tool forcutting said wheel, a holder adapted for moving said tool across theperiphery of said wheel, and a slide on which said holder is movable andwhereby said tool is adapted to be reciprocated to face the sides ofsaid wheel adjacent to its periphery, said holder 'turning on an axlstransverse to the direction of movement of said slide.

5. The combination with a wheel, of guid-' ing means having anoscillatory movement, a slidemounted on said guiding means, a turretadapted. to turn on said slide, a tool movable by said turret in contactwith the periphery of said wheel, and means for reciprocating saidslide.

6. The combination with a wheel, of a slide adapted to reciprocate inthe plane of said wheel, aguide adapted to oscillate on said slide, aslide adapted to reciprocate on said guide, a turret adapted to turn onsaid slide last named, a tool carried by said turret, and means forsimultaneously turning said turret and guide in opposite directions.

7. The combination with a wheel,,of supporting means movable laterallyrelatively to said wheel, a slide adapted to reciprocate on saidsupporting means in the plane of said wheel, guiding means pivoted onsaid supporting means so as -to oscillate transversely to the plane ofsaidwheel, a slide adapted to reciprocate on said guiding .means towardand from the periphery of said wheel, a turret pivotedon said secondnamed slide, atool carried by said turret for acting on said wheel, andmeans for turning said turret and guiding means in opposite directionswhereby said tool is adapted to-be operated in the arc of a circle toround the periphery of said wheel and in-lines angular to the plane ofsaid wheel for conically facing the sides of said wheel adjacent toits-periphery.

8. The combination of oscillatory guiding means, supporting means,adapted to reciprocate on said guiding means, tool holding means adaptedto oscillate on said supporting means, and means for simultaneouslyturning said guiding means and tool holding means in oppositedirections.

9. The combination of oscillatory guiding means, supporting meansadapted to reciprocate on said guiding means, tool holding means adaptedto oscillate on said supporting means, and means. comprising .a leverconnected with said guiding and holding means whereby they aresimultaneously thrown in opposite directions.

10. The combination of oscillatory guiding means, supporting meansadapted to reciprocate on said guiding means, tool holding means adaptedto oscillate on said supporting means, and means comprising a leverprovided with a cam fulcrumed on said guiding means and a deviceconnect- In testimony whereof I have hereunto set my name this 11th dayof May, 1915.

ELMER P. SACREY.

